论文标题
对Rytov近似的新校正，以实现强烈散射有损培养基
A New Correction to the Rytov Approximation for Strongly Scattering Lossy Media
论文作者
论文摘要
我们提出对常规RYTOV近似（RA）的校正，并研究了其在强散射条件下预测波散射的性能。进行纠正和研究的重要动机是帮助开发更好的反向散射模型。校正基于将有损培养基的不均匀波传播的高频理论纳入RA公式。我们将该技术表示为有损介质（XRA-LM）的扩展Rytov近似。 XRA-LM通过为物体的介电性提供高达50倍的介电率，高达50倍，从而显着改善了现有的非著作线性散射近似值（例如RA和BORN近似（BA））。我们通过提供结果来预测二维（2D）区域中零件均匀散射器的波散射的结果来证明该技术。 XRA-LM用于求解直接问题的性能的数值研究表明，XRA-LM可以通过具有高复杂介电常数的电气较大的低损坏散射器来准确预测波浪散射（$ε_r> 50+5J $）。据我们所知，这是第一个非著作，线性近似波散射模型，在介电常数和电气大小方面具有较大的有效性范围。
We propose a correction to the conventional Rytov approximation (RA) and investigate its performance for predicting wave scattering under strong scattering conditions. An important motivation for the correction and investigation is to help in the development of better models for inverse scattering. The correction is based upon incorporating the high frequency theory of inhomogeneous wave propagation for lossy media into the RA formulation. We denote the technique as the extended Rytov approximation for lossy media (xRA-LM). xRA-LM significantly improves upon existing non-iterative linear scattering approximations such as RA and the Born approximation (BA) by providing a validity range for the permittivity of the objects of up to 50 times greater than RA. We demonstrate the technique by providing results for predicting wave scattering from piece-wise homogeneous scatterers in a two-dimensional (2D) region. Numerical investigation of the performance of xRA-LM for solving direct problem show that xRA-LM can accurately predict wave scattering by electrically large, low-loss scatterers with high complex permittivity ($ε_r> 50+5j$). To the best of our knowledge, this is the first non-iterative, linear approximate wave scattering model which has a large validity range in terms of both permittivity and electrical size.
